MGAT2 (UDP-N-acetylglucosamine:alpha-6-D-mannoside-beta-1, 2-N-acetylglucosaminyltransferase II) is a Golgi enzyme catalyzing an essential step in the conversion of oligomannose to complex N-glycans. The enzyme has the typical glycosyltransferase domains: a short N-terminal cytoplasmic domain, a hydrophobic non-cleavable signal-anchor domain, and a C-terminal catalytic domain. Mutations in MGAT2 may lead to carbohydrate-deficient glycoprotein syndrome, type II.